Atsushi Nakajima

文豪ストレイドッグスの主人公は中島敦（中島敦）

Atsushi Nakajima is a member of the Armed Detective Agency who possesses the ability Beast Beneath the Moonlight.

Atsushi has light gray hair, pale skin, and is of average height with a slim build. He has segmental heterochromia, consisting of purple with yellow along the bottom curve of his pupil. His hair is short and swept forward in loose spikes with a lock left long on the right side of his face. This uneven style is the result of bullying he suffered at the hands of other orphans in the orphanage, and he never fixed it. Additionally, he has a prominent black streak in his hair.

Initially, he wears rags issued by the orphanage. After he joins the Armed Detective Agency, Akiko Yosano and Doppo Kunikida issue him a white button-up with the sleeves pushed to his elbows, a loose black tie, black pants, black, fingerless gloves, and a suspenders/belt combo with a long stretch of the belt dangling loosely from the buckle.

When he transforms into a partial tiger, his eyes become tiger-eye like and he develops fangs. If more drastic, his limbs morph into tiger limbs, and his tail emerges.